About OCHI HIIZU
About ISSHIKI YOSHIHIRO
About KAWAI GOSAKU
About copper base alloy
About chromium containing alloy
About metal bar
About carbon steel
About steel plate
About stud welding
About friction welding
About strength
About bending strength
About joint strength
About mechanical property
About joint strength
About Mechanical properties
About Welding techniques
About クロム
About 銅
About 棒
About 炭素鋼
About 摩擦圧接
About 継手